<GCKUIImagePicker> 协议
用于从 GCKMediaMetadata 对象中选择给定用途的图片。
框架在内部使用默认实现，它始终从元数据中选择第一个图像以用于所有用途。应用可以通过设置 GCKCastContext::imagePicker 属性来提供自定义实现。
- 辛塞
- 3.0
此类继承 <NSObject>。
从媒体元数据返回指定类型的图片。
- Parameters
-
| imageHints | The hints about how to pick the image. |
| metadata | The media metadata to pick from. |
- 返回
- 所选图片，如果没有适合请求类型的图片，则为
nil。
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最后更新时间 (UTC)：2022-12-06。
[null,null,["最后更新时间 (UTC)：2022-12-06。"],[[["`GCKUIImagePicker` is a protocol used for selecting images from `GCKMediaMetadata` for display in the Google Cast user interface."],["A default implementation selects the first image from the metadata, but applications can provide a custom implementation for more nuanced image selection."],["The `getImageWithHints:fromMetadata:` method is the core functionality, allowing developers to retrieve an image based on specified criteria (hints) from the metadata."],["By setting the `GCKCastContext::imagePicker` property, developers can customize how images are selected for their Cast application's UI elements."]]],["The `GCKUIImagePicker` protocol is used to select an image from `GCKMediaMetadata`. By default, the framework selects the first image. Applications can implement custom selection logic by setting `GCKCastContext::imagePicker`. The core action is the `getImageWithHints:fromMetadata:` method, which takes `GCKUIImageHints` and `GCKMediaMetadata` as parameters to determine the image. The method returns the selected `GCKImage` or `nil` if no suitable image is found.\n"]]
